The Oxford Thesaurus An A-Z Dictionary of Synonyms - secrecy n.

1) mystery, concealment, confidentiality, stealth, secretiveness, surreptitiousness, privacy, furtiveness, covertness, clandestineness: Why was there so much secrecy surrounding the publication date of Jennie's book? 2 in secrecy. secretly, mysteriously, confidentially, stealthily, secretively, surreptitiously, privately, furtively, covertly, clandestinely, sneakily: They carry on much of their business in secrecy.